Here is a comparison between HostPapa and Hostmonster based on features, price, support and uptime. Features are also compared side by side in detail. Unless otherwise specified, the features mentioned will refer to the cheapest package available of HostPapa and Hostmonster, which need not be equal in terms of price.
Don't forget to check out the coupons of both hosts for some great savings.
About HostPapa About Hostmonster
Hostpapa is a GREEN host with a very reasonable pricing.
Hostmonster - from the same management as Bluehost - is a leading shared hosting service provider. They are one of the top ten web hosts in US, according to independent sources. Just like their bigger cousin Bluehost, they offer only one plan which includes almost all features a shared host can offer.